Indoor Fan Does Not Rotate And There Is No Feedback - Friedrich FSHW091 Service And Parts Manual

Indoor fan does not rotate and there is no Feedback

Is the control panel reliably connected with the motor? Is it loose? Is the connecting sequence correct?
Is the input voltage within the normal range (measure the voltage between L and N of the wiring block XT with AC voltage gauge.)?
Energize the
unit and start it
Voltage between
L and N of
indoor wiring
block
Voltage > 200V?
N
Check power
supply
127
TROUBLESHOOTING
Check the
connecting
Y
state of the
connecting
terminal
Finish
Reliable
N
connection
Y
Replace main
N
board of indoor
unit
Remove the
N
error?
Replace motor
Adjust
connecting
state
remove the
error?
Y